<?php
echo $_SERVER['HTTP_HOST']."<br>"; //localhost

//获取网页地址 
echo $_SERVER['PHP_SELF']."<br>"; //blog/testurl.php
//获取网址参数 
echo $_SERVER["QUERY_STRING"]."<br>"; #id=5

//获取用户代理 
echo $_SERVER['HTTP_REFERER']."<br>"; 

//获取完整的url
echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']."<br>";
echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'?'.$_SERVER['QUERY_STRING']."<br>";
//shttp://localhost/blog/testurl.php?id=5

//包含端口号的完整url
echo 'http://'.$_SERVER['SERVER_NAME'].':'.$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"]."<br>"; 
#http://localhost:80/blog/testurl.php?id=5

//只取路径
$url='http://'.$_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"]; 
echo dirname($url)."<br>";
#http://localhost/blog
?>
<!doctype html>
<html>
    <head>
        <meta charset="utf-8">
        
        <title>个人中心</title>
    </head>
    <body>
        <iframe src="http://wpa.qq.com/msgrd?v=3&uin=554365590&site=qq&menu=yes" ></iframe>
        <a target="_blank" href="http://wpa.qq.com/msgrd?v=3&uin=554365590&site=qq&menu=yes"><img border="0" src="http://wpa.qq.com/pa?p=2::52" alt="点击这里给我发消息" title="点击这里给我发消息"/></a>
        <div class="mainbody">
            <input type="button" value="添加网站" href="index.php">
            <div class="siteList">
                <div class="site">
                    <img src="">
                    <span class="siteUrl"></span>
                    <span class="siteName"></span>
                </div>
            </div>
        </div>
    </body>
</html>